Rotary pump



. p D. R. DOWLING ,3

ROTARY PUMP 4 Filed Dec. 12, 1942 2 Sheets-Sheet 1 Y Invenlor:

Dudley Russell DOG/NIH attorneys Sept. 4, 1945. D. R. DOWLING ROTARYPUMP Filed Dec. 12. 1942 75 Sheets-Sheet 2 I yew.-

Dud 2g Rus ell Doulin b ozw g aifornegs Patented Sept. 4, 1945 ROTARYPUMP Dudley Russell Dowling, Graceville, near Brisbane, Queensland,Australia, assignor of onethird to Frederick Zina Eager and one-third toJohn Kelly, both of Brisbane, Queensland,

Australia Application December 12, 1942, Serial No. 468,745 In AustraliaMay 14, 1942 2 Claims.

An object of this invention is to provide a simple and efllcient gatefor a rotary pump which will make the pump self-priming.

A further object of this invention is to provide a more eflicient andeasily renewable seal between the respective cylinders of rotary pumpswhere the walls of each cylinder consist of the adjacent portion of thecylindrical cavity in the pump body plus concentric portions of a rotorrevolving therein, and the pistons consist of eccentric discs integralwith said concentric discs.

The invention will be fully understood from the following descriptiontaken in connection with the accompanying drawings wherein- Figures 1, 2and 3 are respectively front, end and rear elevations of a pumpembodying the invention;

Figure 4 is a front elevation with the cover removed;

Figure 5 is a pictorial view of the rotor embodied in Figure 1; and

Figure 6 is a pictorial view of the gates.

Referring to the drawings, I is a pump body provided with cover l0 andII are bosses on body ID and cover l2 are grease cups; 3 and M arerespectively inlet and outlet passages for water; i is a base; I6 is agland; H and I8 are spring adjusting studs. The body [0 has a cavity l9(see Figure 4) which is cylindrical and in connection with a gatechamber preferably at the top. This gate chamber 20 is between the inletI3 and outlet l4 and has within it a pair of gates 2| and 22 (see Figure6) of somewhat T-shape, the heads 2| and 22 of the bars being machinedto the curvature of of the wall 20 of chamber 20 against which they moveclosely adjacent. Gates 2| and 22 are pivoted to the body III by a pin23 passing through holes in the ends of the stems, said pin beinglocated at the outlet and on the side thereof away from the flow ofliquid. 24 and 25 are springs between studs l1 and i8 and upper surfacesof gate stems 2| and 22. 26 is a rotor provided with bosses 21 keyed toshaft 28. Rotor 26 consists of a central disc 26 and two opposedintegral eccentric discs 26 and 26 (see Figure 5). Gates 2| and 22 arerecessed at 29 and 30 to snugly accommodate disc 26 of rotor 26. 3| is arin in a groove in disc 26.

In operation the rotor 26 is rotated in a clockwise direction and thegates 2| and 22 are respectively in contact with the peripheries ofdiscs 26 and 26. They always maintain contact being held down by springs24 and 25, the tension of which may be adjusted by studs I1 and I8.

They are also in contact with the vertical walls of disc 26 along thelower portion of their inside surfaces (Figure 6) and in contact withring 3| along the upper portion of said surfaces. The ring 3| of centraldisc 26 is in close contact with the wall of chamber l9 .and with thegates 2| and 22 as noted and disc 26 rotates in the recesses 29 and 30of gates 2| and 22.

Gates 2| and 22 slide against the sides of disc 26 and of rin 3| as theyalternately rise and fall during the rotation of discs 26 and 26.

They thus segregate the water entering via inlet I3 and leaving viaoutlet l4; and at the same time disc 26 and ring 3| segregates the waterwhich is being drawn in behind the respective discs 26 and 26 and beingforced out by them.

In Figure 4 the water is being drawn into the space behind gate 2|,periphery of disc 26', disc 26, ring 3|, body l0, and cover ll.Concurrently water is being forced out from the space in front of gate2| periphery of disc 26', disc 28 ring 3|, wall of body l0, and coverDisc 26 has caused water to be discharged, has drawn in a furthersupply, and as rotation proceeds that charge will be delivered to outletH. The discs 26 and 26 are causing the inflow and outflow at oppositeperiods and are thus preserving a balance.

Although the invention has been described and illustrated in connectionwith a pair of opposed eccentric discs and a pair of gates whichconstruction is most efiicient, it will be understood that one eccentricdisc may be employed with one gate in a gate chamber, or that amultiplicity of balanced opposed eccentrically mounted discs and arespective number of said gates in a chamber may be employed withoutdeparting from the spirit and scope of the invention.

I claim:

1. In a pump, in combination, a body having .1 cylindrical cavity and agate chamber formed therein, said gate chamber extending tangentially tosaid cavity, the entirety of said gate chamber being a part of saidcavity and communieating directly therewith, an inlet formed in saidbody, an outlet formed in said body on the same side of the cylindricalcavity as said inlet, and on the opposite side of said gate chamber withrespect to said inlet, a rotor eccentrically supported in said body tomaintain a portion of the periphery thereof in sliding contact with theperiphery of said body cavity, means constituting a gate located in saidgate chamber in substantial alignment with said inlet, the inlet, theoutlet, the gate chamber and the gate being located 2 a,sse,aeo

close to one snother, ssid ate havin on eIon-.

lsted stem and a. portion extending transverselytossidstemsndhsvinsssubstnntinilywide surisce' in slidins contact withs. substsntislly wide surisce of said :sfe chamber which extendstrsn'sversely to the oi said inlet and hsvin: snother substsntially widesurioce sliding upon the periphery of said rotor. and a pivot mounted atsaid inlet on the side thereof only from the now 0! outlet nuid in thepump and carryin: the outer end oi said stem.

2,111 a. pump conforming to clsim 1, havin: a. plurslity o! gates, s.rotor consisting oi portions replscemcnt.

which no concentric snd eccentric relstively to its center oi rotation,esch 01 said sates slidins on the periphery of s separate eccentricportion, the eccentric portions being located on esch side 0! theconcentric portion. :11 said portions belnz inte rni; and rinse ingrooves in the con centric portions, ssid ring; beinl in sliding contsctwith the wall of the cavity tor-min: the body oi the pump, snd also insliding contsct wi ssid sates, ssid rings beins removsbie to i tote numr nossnu. nownmo.

